most people here don't know how to lube there marker correctly and have never cleaned there valve. they are basically the only things you have to do to maintain your marker besides cleaning it after gameplay.
first lets talk about lubing. now you do not want to use oil. you want to use DOW33. why? because it protects your bolt and hammer from scratches unlike oil, it creates a better seal, and oil causes rings 2 expand witch makes more problems and can destroy the marker to worked so hard to pay for. i will go threw the steps to properly lube your marker.
1st get some DOW33. you can get this anywhere
2nd take out your internals
3rd take out the pin
4th remove old DOW33 with a cotton towel. paper towels and newspapers will scratch the bolt and hammer.
should look like this when done